Knife-grinding mechanism for use with slicing machines



Nov. 4,' 1930. 1,780,868

KNIFE GRINDING-MECHANISM FOR USE WITH SLICING MACHINES E. COULSON Filed May 7, 1928 Inufil'br Edwin, Goulson Patented Nov. 4, 1930 V V 1 7 35 UNITED STATES now-1n conrson, pr omswrex, Lennon, EneLnNaa KNIFE-GRINDING MECHANISM role UsE WITH. SLZGING MAGEHYES Application filed May 7,1928, Seriel Ne. 275, 3 2;6, endjnfir eat Britein June 1, 1327.

This invention has reference to improveing Wheels'into the grinding position ein inlm t i releiinste knife grinding m helieiiee ly' efieets dee it hihg oi; the ee nism for use With slicing machines and reri ge drivi gniechani'em fron'i the driving lates more particularly to slicing machines shaft, v V

5 if the o y vdis k i nd ecipro at ng Th ihv n ieh else reside 1 112 6 p v sion 50 carria e typ V o mean for ensuring theeemfe t eqeifieh h In connectio with sli i g mach nes it is of he h els el'etiie to -th kni -edge nd usual to pro d e grin ing m chenisom for in the means f r Pe m ttingef e 1 A ju ment the knife co p is n e Pa r Of retete ly iih peei ieneith wh e srelet relyiet 10 ne nte g inding Whe s d spos d en. e ther nif teeempeil'ee e er weer! Th ihven- 55 ide ef th vkniieeiid s at h r quisi n l ita ii he iee riee in i the deteileeffeehfor effecting agrinding operation 011 the edge strnction end in the v grinding mechanism as of the knife when brought into operationf avvhole. v e

I e in ne d vi s o t f e e p i The nven -ien wi new be l t hedlvith v ibisdesirable that the reciprocating carriage particnlar reference to the accompanying, 69

er'ryingt e slic ng p a f rm sh u be gli'ssheetei 'elr ing ivh eh illuetrete t ei i ee connected f omth nif dri g m chanism tio egs app ied to eel e he: machin ef the during a g nd ng eper t on as h rw s th ete y disc knife end fee pre' ethig eri'iege out of'balance ef ect occasioned by the reciptype.

2 location of the carriage tends to cause (an unlnthetdrevvipgsz even grinding of the edge of theknife. Fur- Eight? '1 is epert sectional end elevation ther iere, it is desirable that the i d ng o th grinding Whe ls end heir epp rting Wheels shouldhe maintained t e defi ite eng t ve y to the knife-ed n h t y lil ig ire Ziee elevetien o he uprer P r- :honld exerte d finit an p er bly eenien eie. pilla e etenderd eeh tituiingthe ent p e e theknife-e ge- Ib l e seeming meehs ei" thel lis hg le ry n desirable that provisioirshonld be made for the grinding Wheels. the adjustment of the grinding Wheels rela- Figure 3 is a part sectional elevation ofthe tively to the knife in order to compensate for mechanism for permitting of the sirnultaneso the wear f t gr nd ng wh l e e th 011sv d seeh i e iene t e arri ge e'iprocetknife-edge. ing. mechanism from the main driving n ech- The present invention has for its object the anisgn when the grinding wheels are. posiprovision ofan improved meansof' 11101111? tionedifbr the grinding operation, and ing and actuating the grinding mechanism of Figure 4c is a detail View of the means for as slicing machines o the af esai ypewheremoving the, grinding Wheels into a d out f by he flfOrefSaid desider a are bt i contact with the knife-edge.

The invention consists. of an improved Mounted on a bracket bolted to the boss grinding mechanism f r slici g ma e o rrying th hea i g f th knif e il is the typehereinbefore referred to, charactertubiilar'pillar orv standard 5 the upper por- .40 lzed 'by the interconnection of a means for tion 5 vvhereoi is screw threaded'and pro bringing the grinding Wheels into their actvidedvvitha pair ef vertically arranged'dians po ti n with e e u j de ic f upli g metriee' ly epp e d let 5 il y m the carriage reciprocation mechanism to the ed within fhe hore 5 10f thesaid piller or driving shaft s ich that the operation of acstandard 5 is a cylindrical support .6 the up- 4 mati g theseidmeen or r ngingthegrin pe end whereof eerr eee eh ng 7 'wh h constitutes a support for'the grinding wheels 8,9,and their actuating'mechanlsm as Wlll be hereinafter more particularly described. In;

terposed between the lower end of the saidsupport-and the bottom of thebore of the pillar or'standardisa coil spring which normally tendsfto press the support in an upward direction; fWithin the lowerportion of the support is formed a cylindrical hole through which is passed a pin ll of a greater length than the outer diameter of the threads ed portion of the pillaror standard 5, said pin being adapted tolbe located and to slide within the slots formedin the 'upper end" of'the said pillar or standard.-- The upper side of I the pin abuts the underface of a screw cap 12 adapted to engage with the threaded-portion? 5*. of the pillar or standard 5 for the purpose of securing the support 6 to thepillar or standard 5' whereby by screwing or unscrew-- ing the cap 12 the height of the housing 7 relatively'to the pillar or standard can be adj ustin the said tube against the opposition of a lever'the lower arm 1'6 whereof bears on a flange 8 secured to theend of'the spindle 8?) of the main grinding wheel ,8 the crank arm 16 of thesaid lever being provided at its end with a horizontally disposed iprojectionvlti which carries a ball section 16 adaptedvto be located within a tube 17 and to have motion coil spring 18 disposed within thesaid tube. The said tube 17 is provided along one side with a vertically disposed slot forpermitting of the requisite motion of the projection carrying the ball. 1

Mounted in the upper end of the tube isa v screw 19 the nose whereof impinges on the aforesaidball section 16 and admits of a variation of the setting vof the crank arm 16 of a triple-armed lever against the opposition of the coil spring 18 located within the tube. VThe lower end of the aforesaid tube 17 is 1 secured to the upper end of arod 20 the lower end whereof is pivotally-connected to the end of one arm of a lever 21 fulcrumed on-a spin- 'dle 21? secured to the base of the slicing machine. This lever 21 is provided adjacent the fulcrum with an upwardly extending crank V 22 provided with a forked portion carrying inwardly directed pegs 22" adapted to engage in a groove 23 formed in the male member 23 =ofa clutch splined on the main driving shaft 24: of the machine, the female member 25 of the clutchbeingloosely mounted on the said through a skew pinions 26, 27.

The skew pinion 27 is keyed on a vertically disposed spindle 27 to theupper end whereof isiattached one endof a crank arm 28 and other end whereof is pivotally connectedto in i one end of'a connecting rod 28 the other driving shaft 24 and having connection end whereof is pivotally connected to a pro-.

jection 28 which is adapted to reciprocation on a pair of slides 28", one slide only being shown in the drawing, It will be seenthat upon rotation of the skew pinion 27, the crank, arm 28 is rotated and effects through the con necting rod28 a reciprocation of the carriage 28. Adjacent its outer end the. driving shaft has-keyed thereon a bevelpinion 29 which meshes with a bevel pinion 30 mounted on a shaft having keyed thereto a sprocket-wheel 31 which drives the knife 15' through the medium of admin 32." Disposed about a large portion of the spindle 21 is a coil spring 22 ,-on e end whereof isanchored to a'fixed part ofthe machine and the other end where of is adapted to bear on the crank arm 22 so a as to tend toforcethe said arm, so as to move themale member 23 of the clutch into e'ngagement with' the female member 25. The operatinglever 21 is provided on its; outer end with aknob'21 the said lever alsovco-operating with a guide plate 33 provided with means for locating the control leverin one orotherj of its.; set positions. fThe said crank' 22'jon the'control lever is arranged so. that when'the lever 21 is actuated to lowe'rf the grinding wheels 8 and9 intocontact with the knifeedge the said operationsimultaneously ef fects a withdrawal of the clutohl;

V 1 The operation of the device is as follows: When it is desired to effect a sharpening of the knife 15 thecontrol lever 21 is moved in a downward direction thereby effecting a-n upwardrmovem-ent of the rod 20'connected to the other end thereof, the upward movement of the said rod 20 through the tube 17 effecting an anti-clockwise movement of the crank arm 16 of the triple-armed lever whereby the arm 16 in contact with the end ofthe spindle 9 of the finishing wheel'moves in a clockwise direction and allows the sp-ring}13 disposed about the saidspindle to bring the surface or the grinding'wheel 9 into contact with the, knife. Simultaneously .the other.

arm 16 of the said'triple-armed lever moves in a clockwise direction away from the flange 8 on the-end of the spindle 8 carrying the main grinding wheel 8 whereby; the] said wheel 8, under the agency of the coil spring 14, is forced into contact with the knife-edge.

The movement of the operating J lever 21:

through the crank 22- also effects sim-ult ane ously a withdrawal of themalemember 23 of'the clutch and thereby frees the carriage reciprocation mechanism from driving con- }nection with the main shaft 24 whereby the knife can be rotated for efiecting a grinding operation without necessitating any reciprocation of the carriage. WVhen the grinding operation has been completed the operating lever 21 is raised whereupon the rod is moved in a downward direction thereby causing the upper arm 16 of the triplearmed lever to bear on the end of the spindle 9 carrying the finishing wheel 9 and to force the said wheel away from the knife 15 against the opposition of the coil spring 13, at the same time the lower arm of the triple-armed lever bears on the flange 8 on the end of the spindle 8 of the grinding wheel 8 and forces the said Wheel 8 out of contact with the edge of the knife against the opposition of the coil spring 14.

It will be appreciated that in a construction hereinbefore described the grinding wheels 8 and 9 when in the grinding position are maintained in a definite position relative to the knife-edge and ensure a constant pressure thereon under the action of their respective coil springs. Moreover, the

operation of positioning the grinding wheels automatically effects a de-clutching of the carriage traversing mechanism of the drivlng mechanism whereby the knife 15 can be r0- tated for effecting the grindingoperation e without the out of balance effect occasioned by the traverse of the carriage 28. Furthermore, the means for adjusting the setting of the crank arm 16 of the triple-armed lever permits of a ready adjustment of the wheels to compensate for Wear in the face of the wheels and, in addition, the provision of the means for adjusting the wheel supporting housing 7 admits of the ready ad ustment of the position of the wheels as a whole to compensate for any wear so that the maximum amount of usage can be obtalned from the grinding wheels.

Claims a 1. A. grinding mechanism for slicing machines of the rotary disc knife and reciprocating carriage type comprising a support, spindles slidably mounted relatively to said support, grinding wheels rotatably mounted on said spindles and adapted to be moved into and out of contact with the edge of the knife, projections on said spindles, a rockable triple armed lever the ends of one pair of arms whereof are adapted to bear on said projections, spring means adapted to bear on the spindles and adapted normally to tend to maintain the grinding wheels 1n contact with the knife edge, an actuating lever, means connecting the third arm of the triple armed lever to said actuating lever, a driving shaft for imparting rotary motion to the knife, a clutch member freely mounted on the driv ing shaft and in connection with the carriage reciprocation mechanism, a co-operating clutch member slidably but non-rotatably 1; mounted on the driving shaft, an arm rigidly chines of the rotary disc knife and reciprocating carriage type comprising a support, a pair'of grinding wheels rotatably and slidably mounted relatively to said support, means for moving said wheels into and out of contact with the knife edge, a rotatable driving shaft, means driven from said shaft for effecting a reciprocation of the carriage, a clutch member slidably but non-rotatably mounted on said driving shaft, an actuating means adapted to effect the engagement and disengagement of the said clutch member, means connecting said actuating means to the means for moving the grinding wheels into and out of their acting position the connection between the actuating means and the clutch member and between the actuating means and the grinding wheel control means being such that the operation of moving the said member for disengaging the clutch and thereby disconnecting the carriage reciprocation mechanism from the driving shaft simultaneously causes the member connecting the actuating means and the grinding wheel control means to cause the said grinding Wheels to move into their acting position.

3. A grinding mechanism for slicing machines of the rotary disc knife and reciprocating carriage type comprising a support, spindles slidably mounted relatively to said support, grinding wheels rotatably mounted on said spindles, projections on said spindles, a rockable triple armed lever the ends of one pair of arms whereof are adapted to bear on said projections, spring means adapted to bear on the spindles and normally to tend to maintain the grinding wheels in contact with the knife edge, an actuating lever, means 1 connecting the third arm of the triple arm lever to said actuating lever, a rotatable driving shaft, means driven from said shaft for imparting a rotary motion to the knife, means driven from said shaft for efit'ecting a reciprocation of the carriage, a clutch member freely mounted on the driving shaft and connected to a part of the mechanism for effecting a reciprocation of the carriage, a clutch member freely but non-rotatably mounted on the driv- 1 ing shaft and adapted to he engaged arid dis= engaged by'the operation not said actuating lever-the relationofithe actuating lever to the clutch member and to the grinding Wheel con; trol means being such 7 that the actuation. of the .said' lever foi' disengaging theclutch simiiltaneousl-y' disconnects the carriage reciprocation me-chanism;r0m.;the drivingjshaft and'eauses thegrinding rwheel contrbl means 0 togimovelthfivgi'imii g Wheels into the acting position- 5; 1 Y 7 7 e r a In I teetimonyuwhereof 'I vhave hereunto set my hand." T 1; EDWIN COULSON-.- 

